From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: pjb@informatimago.com (Pascal J. Bourguignon) Newsgroups: gmane.emacs.help Subject: Re: Is it possible for a macro to expand to nothing? Date: Fri, 27 Nov 2009 18:45:33 +0100 Organization: Informatimago Message-ID: <87pr73vp36.fsf@galatea.local> References: <87vdh1ccra.fsf@galatea.local> <87my2dc8d7.fsf@galatea.local> <873a44dcf2.fsf@galatea.local> <87pr78b6n9.fsf@galatea.local> <87ljhwb2dx.fsf@galatea.local> <873a406poe.fsf@galatea.local> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1259347248 23136 80.91.229.12 (27 Nov 2009 18:40:48 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 27 Nov 2009 18:40:48 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Fri Nov 27 19:40:41 2009 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1NE5kG-0002cs-UM for geh-help-gnu-emacs@m.gmane.org; Fri, 27 Nov 2009 19:40:41 +0100 Original-Received: from localhost ([127.0.0.1]:49872 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1NE5kG-0001Cd-He for geh-help-gnu-emacs@m.gmane.org; Fri, 27 Nov 2009 13:40:40 -0500 Original-Path: news.stanford.edu!usenet.stanford.edu!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail Original-Newsgroups: gnu.emacs.help Original-Lines: 16 Original-X-Trace: individual.net 3gvbxr5boiv9O7a/gKFLlgLVP2nknrNn72T3RefN+1EiZ/JqXf Cancel-Lock: sha1:NmQ0OTNkMTA1MzE2NGY5MmM3ZWE5Y2IyNDEyZThkOTllODZjNTY0MA== sha1:q2OzFtZ13XEoJb2BuKIqaCJEzAE= Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwAQMAAABtzGvEAAAABlBMVEUAAAD///+l2Z/dAAAA oElEQVR4nK3OsRHCMAwF0O8YQufUNIQRGIAja9CxSA55AxZgFO4coMgYrEDDQZWPIlNAjwq9 033pbOBPtbXuB6PKNBn5gZkhGa86Z4x2wE67O+06WxGD/HCOGR0deY3f9Ijwwt7rNGNf6Oac l/GuZTF1wFGKiYYHKSFAkjIo1b6sCYS1sVmFhhhahKQssRjRT90ITWUk6vvK3RsPGs+M1RuR mV+hO/VvFAAAAABJRU5ErkJggg== X-Accept-Language: fr, es, en X-Disabled: X-No-Archive: no User-Agent: Gnus/5.1008 (Gnus v5.10.8) Emacs/22.3 (darwin) Original-Xref: news.stanford.edu gnu.emacs.help:175122 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:70195 Archived-At: Helmut Eller writes: > * Pascal J. Bourguignon [2009-11-27 14:52+0100] writes: > >> ,@ cannot be put outside of a ` context, never ever. > > That's not true. ,@ outside of backquote is just an ordinary symbol: > > (defun ,@ () "it works") > (defun , () "this works too") > (message "See, how %s. And %s." (,@) (,)) Oops! (I was right in Common Lisp, but emacs lisp is different here). -- __Pascal Bourguignon__